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The University of Southampton
Engineering

Research project: TRANSIT

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TRANSIT (Train pass-by Noise Source characterization and separation Tools for cost-effective vehicle certification) is funded by Shift2Rail / Horizon 2020 (2019-2022).

TRANSIT is a Shift2Rail project that will provide the railway community with a proven set of innovative tools and methodologies that reduce the environmental impact and improve interior acoustic comfort of railway vehicles.

There is a need for new modelling and experimental techniques that will enable a new generation of low noise vehicles and improved certification techniques at a lower cost, leading to a reduced environmental impact, higher comfort and, thus, greater public acceptance of railway transportation. The overall goal of TRANSIT, funded by Shift2Rail / Horizon 2020, is to provide the railway community with a proven set of innovative tools and methodologies to reduce the environmental impact, and to improve interior acoustic comfort of railway vehicles.

Following on from our work in previous EU projects Acoutrain and Roll2Rail, we are working in several areas of the TRANSIT project:

1) Source characterization methods: TRANSIT will improve simulation capabilities for exterior train noise at standstill and pass-by according to ISO 3095:2013 by building on existing tools developed in the previous project Acoutrain. The transmission path models will include acoustic installation effects such as shielding and diffraction. A methodology will be proposed to estimate uncertainties of the complete simulation process.

2) Pass-by noise source separation methods: Novel and innovative techniques will be developed, in combination with existing methodologies, to determine the sound power level and directivity of the different noise sources during pass-by at a constant speed. This will include aerodynamic sources, traction sources and rolling noise.

3) Separating the contributions of vehicle and track to the pass-by noise: TRANSIT will develop and validate methods for separating the contributions of vehicle and track to rolling noise during train pass-by, building on techniques that were identified in the Roll2Rail project. These will be improved to increase their accuracy while also reducing cost. The methods will be able to transpose pass-by data measured on one track to another. Wheel and rail roughness will also be separated. The validation and data collection will be extended to several vehicle/track situations using field measurements.

Associated research themes

Railway noise and vibration

Related research groups

Dynamics Group
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